The 44-year-old was pushing his bike along Surrey Road, at about 8.30pm, when he was assaulted by a group of people. He was taken to Hinchingbrooke Hospital for treatment. Officers dont believe that any weapons were used during the robbery. Two teenagers have been arrested on suspicion of robbery. An 18-year-old was arrested shortly afterwards, and a 17-year-old was arrested this morning (Thursday). Both teenagers are currently being held at Huntingdon Police Station.